space Flashcards by bethany sumner

Q

how does gravity affect object in obrit?

A

causes it to accelerate towards earth
this changes direction of motion but doesn’t change speed
so changes velocity

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Q

what is meant by red shift

A

observed increase in wavelength of galaxies
as galaxies move away from us

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Q

explain how red shift provides evidence for big bang

A

furthest galaxies moving away fastest
implying all galaxies started at the same point

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